ARCHIVED REPORTS XR0000988 - Laserfiche WebLink

Home Browse Search

valley Water Treatment Page 2 Groundwater Monitoring Well Construction Project No. 480.2 March 14, 2006 ' of gasoline hydrocarbons in the soil and groundwater in the area of the former tank. NOn May 17, 2005, the San Joaquin County Environmental Health Department directed that a Work Plan be submitted to describe procedures and protocols to help define the lateral and vertical extent of gasoline contamination. On June ' 16, 2005 Geo-Phase Environmental Inc. submitted a Work Plan proposing the construction of four groundwater monitoring wells. The Work Plan was ' approved and this current report documents its execution. 1.2 Scope of Work ' To further characterize the extent of hydrocarbon contamination from this fuel release, the following work was completed: ' • Four hollow stem auger soil borings were drilled to a total depth of 20 feet below grade. The boxings were later converted groundwater monitoring ' wells. One of the wells was placed at the point of release, while the other three were distributed around the point of release. The well borings were logged, and soil samples were collected for geologic description and '! possible laboratory analysis (see boring logs in Appendix B). D The borings were converted to groundwater monitoring wells, developed, and sampled. The resulting groundwater samples were submitted to a State certified laboratory for analytical testing. • For each of the groundwater monitoring wells, the precise vertical and horizontal position of each well was established by a survey conducted by a licensed surveyor. • A receptor survey was completed. This consisted of a search of all extant groundwater production wells within 2000 feet of the point of release. 2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone (209) 569-0293 Modesto, CA 95356 Fax (209) 569-0293